Phat is right about the .001 per 1 inch diameter rule of thumb.
But, make sure the bore you are shrinking it into is not egg shaped, tapered or just plain whollered out.
You seem to have a good machining background, so I think you can make it work!
Please let us know how you corrected the issue!

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!